That's your interpretation. The context is getting large boobs in a year of hormone therapy. The other person said that the typical 4chaner edgelord is overweight and thus shouldn't be so hard to get bigger boobs in a year.
The devaluating part of the term is "edgelord", not "overweight", you are for some reason bringing fat shaming into the convo when it's about edgelord shaming of overweight people.